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Fig. 1


a) Radiocarbon 14C production rate Q(t) reconstructed from IntCal09 (Reimer et al. 2009) and SHCal04 (McCormac et al. 2004) data in the form of an ensemble of 1000 series using the Bern3D-LPJ model (Roth & Joos 2013) and accounting for uncertainties; the mean of these series (solid line) and the inferred 95% confidence interval (CI, shaded area) are plotted. b) Geomagnetic dipole moment M(t) as taken from the A_FM ensemble of 1000 archeomagnetic field models (Licht et al. 2013), the ensemble mean (solid line) and inferred 95% CI (shaded) are plotted.

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